Speaker



FIG. 1 is a front perspective view of a design for a speaker, according to the invention.

FIG. 2 is a rear perspective view of the speaker of FIG. 1.

FIG. 3 is a front view of the speaker of FIG. 1.

FIG. 4 is a rear view of the speaker of FIG. 1.

FIG. 5 is a top view of the speaker of FIG. 1.

FIG. 6 is a bottom view of the speaker of FIG. 1.

FIG. 7 is a left side view of the speaker of FIG. 1; and,

FIG. 8 is a right side view of the speaker of FIG. 1. 

The ornamental design for a speaker, as shown and described. 